[PATCH] D20892: [esan|cfrag] Instrument GEP instr for struct field access.

[Qin Zhao via llvm-commits]

zhaoqin created this revision.
zhaoqin added reviewers: aizatsky, bruening.
zhaoqin added subscribers: bruening, kcc, vitalybuka, eugenis, llvm-commits, zhaoqin.

Instrument GEP instruction for counting the number of struct field
address calculation to approximate the number of struct field accesses.

Adds test struct_field_count_basic.ll to test the struct field
instrumentation.

http://reviews.llvm.org/D20892

Files:
  lib/Transforms/Instrumentation/EfficiencySanitizer.cpp
  test/Instrumentation/EfficiencySanitizer/struct_field_count_basic.ll

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